【单选题】2-3 用系统命名法命名化合物 ,正确的 是( )。
【单选题】Sara, hurry up.I'm afraid you won't have time to ________ before the party.
【单选题】John, get up! I'm afraid you won't have time to ______ before going out. [ ]
【单选题】下列化合物用系统命名法命名,正确的是:
A.
7,7-二甲基三环[1.2.2]-2,5-庚二烯
B.
7,7-二甲基二环[1.2.2]-2,5-庚二烯
C.
2,2-二甲基三环[2.2.1]-4,6-庚二烯
D.
7,7-二甲基二环[2.2.1]-2,5-庚二烯
【判断题】真核细胞的线粒体和叶绿体中也含有DNA。
【单选题】"I won't get by on mere imagination" means ________.
A.
I won't get to the destination where I dream about
B.
I won't pass the exam by just thinking
C.
I won't succeed in pursuing you as my girlfriend by dreaming
D.
I won't realize my dream by just doing nothing